Add utf_string_conversions to base namespace.

chrome/browser/history/history_publisher_win.cc

Index: chrome/browser/history/history_publisher_win.cc
diff --git a/chrome/browser/history/history_publisher_win.cc b/chrome/browser/history/history_publisher_win.cc
index 31e5241c99591f7df8869bafd7150b7eecafaafa..1d7d4a58f8121e81c0f123fc0ae4ad5ec2c034c1 100644
--- a/chrome/browser/history/history_publisher_win.cc
+++ b/chrome/browser/history/history_publisher_win.cc
@@ -101,12 +101,12 @@ void HistoryPublisher::PublishDataToIndexers(const PageData& page_data)
 
   // Send data to registered indexers.
   base::win::ScopedVariant time(var_time, VT_DATE);
-  base::win::ScopedBstr url(ASCIIToWide(page_data.url.spec()).c_str());
+  base::win::ScopedBstr url(base::ASCIIToWide(page_data.url.spec()).c_str());
   base::win::ScopedBstr html(page_data.html);
   base::win::ScopedBstr title(page_data.title);
-  // Don't send a NULL string through ASCIIToWide.
+  // Don't send a NULL string through base::ASCIIToWide.
   base::win::ScopedBstr format(page_data.thumbnail_format ?
-      ASCIIToWide(page_data.thumbnail_format).c_str() :
+      base::ASCIIToWide(page_data.thumbnail_format).c_str() :
       NULL);
   base::win::ScopedVariant psa(thumbnail_arr.m_psa);
   for (size_t i = 0; i < indexers_.size(); ++i) {